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A team of researchers from the Centre for Nano and Soft Matter Sciences in Bengaluru have successfully developed a high-performance aqueous transparent battery with color modulation capabilities. These windows remain transparent during the day while storing energy, and at night, the stored energy can power electronic devices within the room while transitioning to a dark blue state for privacy.

The unique design of this transparent battery utilizes aluminum-ion battery technology, integrating a cathode material composed of thickness-optimized electro-chromic tungsten oxide (WO3) and aluminum as the anode. Lead scientist Dr. Ashutosh Kumar Singh explained that these transparent energy storage devices have significant potential for integration into smart window applications, offering energy storage capabilities with adaptive transparency. The use of aqueous electrolytes makes them cost-effective, high-performing, and safe, making them ideal for use in modern infrastructures.

According to Dr. Singh, commercialization of this technology would require minimal investment and that they are open to collaborating with potential smart glass manufacturers. The research on this transparent battery was recently published in the journal ACS Applied Energy Materials.

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